How do I start JavaScript? console.log

JavaScript is the language of the browser. The first program writes one sentence to the console. Name the file index.html and put the script inside it.

<!DOCTYPE html>
<html lang="en">
  <body>
    <h1>Hello</h1>
    <script>
      console.log("Hello, JavaScript");
    </script>
  </body>
</html>

1. Open the file in a browser.
2. Press F12 and open the Console tab.
3. You will see the text Hello, JavaScript there.

console.log does not put a button on the page. It is for checking: it shows what the program is thinking.

Where do I write JavaScript? In the browser, inside the script tag of an HTML file.

What does console.log do? It writes text or a number to the console.

Does it show on the page? No. It shows only in the Console panel.

Do I need to install a program? Not for the first step. A browser is enough.